Can't Sleep After Sex

Sleeping after sex depends on age, health. Some time how long intercourse was. When I had situation two years ago after long intercourse i sleep, my friend gave me advise. After long intercourse few minutes of relaxed hugging each other in same position without taking penis out, then went on 69, we both licked and sucked long time, after I drank her juice for long time, I got brisk, then went on foreplay had another long intercourse by licking and sucking her natural juice from all over top portion of body. We continued like this one more time. Then went sleep together by hugging in nude, next day morning had another long intercourse in shower

I've had this as long as I can remember, 34 m. think it's hormonal or in brain, neurotransmitters?I have no trouble sleeping, only after ejaculation so I can rule caffeine out, but if it exacerbates or adds to it then. I get nocturnal emissions(wet dreams)sometimes usually after some rich food b4 bed or I think it's to do with cholesterol, maybe there's some blockage with the brain gut psychology/ connection